fix: make coupon_limitperiod nullable

database/migrations/2025_11_13_171048_fix_coupon_nullable_fields.php

@@ -18,6 +18,7 @@ class FixCouponNullableFields extends Migration
             // Change from 0000-00-00 00:00:00 to current_timestamp. No need to revert.
             $table->timestamp('coupon_createdate')->useCurrent()->change();
             $table->integer('coupon_limitquantity')->nullable()->default(null)->change();
+            $table->integer('coupon_limitperiod')->nullable()->default(null)->change();
         });
     }
 
@@ -30,6 +31,7 @@ class FixCouponNullableFields extends Migration
     {
         Schema::table('coupon', function (Blueprint $table) {
             $table->integer('coupon_limitquantity')->nullable(false)->default(1)->change();
+            $table->integer('coupon_limitperiod')->nullable(false)->default(0)->change();
         });
     }
 }